Will I improve the qualitry of sound?

when you mention your speakers (btw that's the only b&w i liked out of the whole line), i also figured that going from 70w to 130w won't make a desired upgrade. aim for 200w amps or add sub.

You can improve the quality of sound, if that's your goal, by going with a better amp with more power. Sure going from 70w/ch to 130 of basically the same sounding amp will make the speakers sound a bit better just by providing more headroom, but you will retain the sonic signature of your 1050 amp for better or worst.

So, my point is, if to improve the sound is your altimate goal, you may want to consider a better amp than 1050 and 1070 put together.
For some affordable amps, look into McCormack older DNA-0.5 Deluxe, DNA-1. Or if you want to spend more, check out Pass Labs, Audio Research, McIntosh, Levinson and the older Krell Class A amps, such as the 100w/ch KSA-100S would be nice.

You can sell your amp and the preamp you are driving it with and get a nice integrated(e.g Krell KAV-400xi). The amplification is very important. Do not neglect it, especially with the N805s. They may be small speakers, but they do like power. And there are plenty of options at all different price points. Best of luck!

Thanks audphile for your recommendations. They did open up some new areas that I should explore. Right now it is a question of how much can I or should I invest in upgrades. My other hobby is fly fishing. They are alike in the fact you can never reach perfection in either one. I guess that is what makes it challenging. JNorth

I would say a lateral move at best...I would suggest going with an entirely different amp as opposed to staying in the Rotel camp...just my .02...